do a 3 pic ordeal revolving around Ruby (physically regressed to Max's age) and playing with Max (while Ruby is in her now loose, oversized and baggy clothes) [Age Regression]
the 1st pick will be them playing tag, the other 2 i leave for you to decide
but remember, keep it clean and PG rated
P.s. a regression process to kick off the 3 pics would be nice, given if the artist is up for it!

[Note: If you don't wanna do the 3 Pic ordeal, you could do just physically regressed Ruby playing with Max]

to give you a jist of how old they are
Ruby is 7 yrs. old and Max is 3

(Ruby & Max are characters from "Max & Ruby")

references (FYI: Ruby doesn't wear the hat [seen on the 1st ref] on a regular basis in the cartoon)

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http://www.nickjr.com/flex_article/.....paper-wide.jpg
http://www.mamapop.com/wp-content/u.....by-525x393.jpg
http://img337.imageshack.us/img337/.....9/35732504.jpg
http://www.corusent.com/Home/images.....ef542f9c96.jpg
http://presse.nick.de/sites/default.....x_and_Ruby.jpg
http://presse.nick.de/sites/default.....and_Ruby_2.jpg
http://www.corusent.com/Home/images.....43d614fef1.jpg
http://ecx.images-amazon.com/images.....4L._SX500_.jpg
http://maxandruby.treehousetv.com/c.....s/max/max1.png
http://sharetv.org/images/guide/290433.jpg
http://images.starpulse.com/Photos/.....Ruby-tv-01.jpg
http://munrobooks.com/assets/produc.....1554701643.jpg
http://www.awn.com/files/imagepicke.....5/Max-Ruby.jpg
http://img836.imageshack.us/img836/.....4/60516164.jpg
http://img607.imageshack.us/img607/.....1821h10m44.jpg
http://img861.imageshack.us/img861/.....1821h12m38.jpg
http://img40.imageshack.us/img40/65.....1821h13m02.jpg